passenger supply oxygen mask
... 闭式回路供氧面罩 closed circuit supply oxygen mask 旅客供氧面罩 passenger supply oxygen mask 乘员供氧面罩 aircrew supply oxygen mask ...
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passenger supply oxygen mask
乘客供氧面罩
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Compared different oxygen supply methods, BLB mask was chosen for oxygen supply system of passenger cars on Qingzang railway.
对比不同的供氧方法，选择blb氧气面罩用于青藏客车供氧。
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